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Cr/rGO nanocomposite with MnO. (A) CV curves obtained at a scan rate of 50 mV·s−1 in O2- and N2-saturated 0.1 M KOH solution. (B) LSV curves in O2-saturated 0.1 M KOH with various rotation rates. (C) Comparison of LSV curves of synthesized composite and those of commercial 20% Pt/C at rotation rate of 1,600 rpm. rGO, reduced graphene oxide; CV, cyclic voltammetry; LSV, linear sweep voltammetry.
